Mining apparatus



July 7, 1931. M. P. HOLMES MINING APPARATUS Filed Jan, 11. 1929 4 sheets-Sheet 1 m M m w SQ www www N .N @MN July 7, 1931., M. P. HOLMES 1,813,804

MINING APPARATUS Filed Jan. ll, 1929 4 Sheets-Sheet 2 1415 Z7" .3. 617 M l y gz? Z955. Z2 @g f 451@ M i gf gz w @594' g 5 y@ lyl/ l A i 7 q 96 m ,/l/Jflv i 110 o 99 10g f' l' 117 115 113 07m www y Z ZZ M l@ Z39 July 7, 1931 M. P. HOLMES MINING APPARATUS Filed Jan. ll, 1929 Jig, 7

4 Sheets-Sheet 3 97 z5 m M July 7, 1931. M R HOLMES 1,813,304

MINING APPARATUS Filed Jan. ll. 1929 @Sheets-Sheet 4 Il Z Patented `uly '7, 19.31

STATES MORRIS P. HOLMES, 0F CLABEMONT, NEW HAMPSHZEE, ASSIGNR TO -SULLIVAN- MACHINERY COMPANY, A CRPGRATEON OF MASQLCE'USETTS IfIIN ING APPARATUS Application led January 11,1829.

This invention relates to mining apparatus and more particularly to coal mining apparatus of the wheel mounted type adapted to operate from the mine trackway.

An object of this invention is to provide an improved mining apparatus. Another object is to provide an improved coal mining apparatus of the wheel mounted type adapted to operate from the mine trackway and having improved adjustable kerf cutting mechanism whereby a series of cuts in the coal face in a plurality of intersecting planes may be made. Still another object is to provide an improved coal mining apparatus of the combined vertical and horizontal cutter type having improved and simplilied means for adjusting the cutter into its different operative positions. A further object is to provideran improved coal mining apparatus of the type adapted to insert a series of horizontal and vertical or shear cuts in the coal face having an improved adjustable mounting for the cutter and improved means for adjusting the mounting. Still another object is to provide in an apparatus of the aforesaid type improved means for adjusting the cutter into positions lying in different planes and for swinging the cutter to effect its cutting function, together with improved and simplified means for actuating the cutter in its several adjusted positions. Yet another object of this invention is to provide a mining apparatus of the aforesaid type having improved means for propellingr the apparatus along the mine traclrway during the cutting operation and transport of the apparatus about the mine. A still further object of this invention is to provide in a mining apparatus of the aforesaid type an improved, simplified, and exceedingly compact general arrangement of parts whereby the apparatus may he operated with facility and expeditiously in mines having narrow entries and low headroom. These and other objects and advantages of this invention will, however, hereinafter more fully appear.

In the accompanying drawings there 1s shown for purposes of illustration one ern- Serial No. 331,839.

bociment which the invention may assume in practice. In these drawings,-

Fig. l is a top plan view of the yimproved mining apparatus. y

Fig. 2 is a side elevational view of the mining apparatus shown in Fig. l.V

Fig. 3 is a cent-ral longitudinally extending vertical sectional view taken substantially on line 3 3 of Fig. l, with parts shown in elevation.

Fig. 4 is a central longitudinally extending vertical sectional view partially in clevation taken substantially on line 4- 4 of Fig. 1.

Fig. 5 is a transverse vertical sectional view taken substantially on line 5 5 of Fig. 2.

Fig. 6 is a detail sectional view taken on line 6 6 of Fig. 3, and illustrating the transmission chain lock.

Fig. 7 is a transverse vertical sectional view taken substantially on line 7 7 of Fig.

2, with parts shown in elevation.

Fig. 8 is a detail sectional view taken on line 8 8 of F ig. 7. Y

Fig. 9 is a transverse vertical sectional view taken substantially on line 9 9 of Fig. 2, with parts shown in elevation.

Fig. 10 is an enlarged horizontal sectional view illustrating the details of the plural speed transmission mechanism.

Fig. ll is a transverse vertical sectional View taken substantially on line ll-ll of Fig. 10.

Fig. 12 is a detail sectional view taken on line 12-12 of Fig. lO.

ln this illustrative einbooiment of the invention there is shown a coal mining apparatus of the wheel mounted type adapted to operate from the mine traclway and generally comprising a wheeled truck l havingV usual wheels 2 adapted to run along amine trackway 3. Mounted on and suitably rigidly fixed to the truck l is a low compact machine frame or body 4; carrying at itsV forward end improved adjustable kerf cutting mechanism generally designated 5 and housingV within its intermediate portion a motor 6 adapted to eiectdrive of the vari-V ous devices of the apparatus in either of opposite directions. Housed within the rear end of the frame 4 and driven from the motor 6 is a transmission mechanism '7 for driving the truck wheels and for effecting adjustment of the kerf cutting mechanism, the motor also actuating the kerf cutting mechanism. As hereinafter described the kerf cutting mechanism is adjustable into vertical, horizontal, and intermediate planes and is swingable transversely in its plane, improved means being provided for adjusting the cutting mechanism and for swinging the cutter.

Referring more particularly to the improved kerf cutting mechanism 5 it will be noted that the motor 6 is herein vpreferably of the electric reversible type having its armature shaft 8 horizontally disposed and extending longitudinally of the apparatus. As shownin liig. 3, the forward rend of `the armature shaft 8 has rigidly fixed thereto and rotatable therewith a sleeve-coupling 9 j ournaled in a ball bearing 10 suitably supported by the front motor head. The coupling 9 is splined at 11 to an alined coupling shaft 12. The forward end of the shaft 12 is keyed at 13 to an alined shaft 14 journaled in a ball bearing 15 supported by a forwardly projecting sleeve-like bearing portion 16 herein formed integral with a frame member 17 rigidly fixed to the casing of the motor 6, the bearing portion 16 of the frame surrounding the alined shafts 12 and' 14. The shaft 14 has herein preferably formed integral tnerewitha bevel pinion 1S meshing with a bevel gear 19 her in formed integral with a transverse shaft 20 journaled in spaced alined ball bearings 21 suitably supported within a rotatable cutter head 22. The rotatable cutter head 22 has a rearwardly extending sleeve-like bearing portion 23 encircling the bearing portion 16 of the frame and journaled on the bearing portion 16 for rotation about a longitudinal axis, herein coincident with the axis of the motor, in a roller bearing 24 and a ball bearing 25, the latter being held in position by a retaining ring 26. lt will be noted that the roller bearing 24 and ball bearing 25 are arranged in longitudinal spaced relation a substantial distance apart, thereby forming an exceedingly stable support for the rotatable cutter head 22. 'l he shaft 2G has also formed integral therewith a spur pinion 27 meshing with a spur gear 2S: journaled on ball bearings 29 supp rted by a transverse main cutter driving shaft .30. The shaft 30 has keyed thereto at 31 a cutter chain drive sprocket engaging and driving a cutter chain 33 mounted for orbital movement on the margin'of an elongated plane cutter bar 34. rl`he rear end of this cutter bar is provided with an annular bearing portion 35 `mounted for rotative movement about the axis of the shaft 80 on a bearing sleeve 36 supported on the projecting cylindrical portion 37 of the cutter head frame. The bearing portion 35 for the cutter bar is rigidly secured by screws 38 to a member 39 in turn secured by screws 40 to an annular bearing plate 41. The bearing plate 41 engages a bearing sleeve 42 supported on a radial flange 43 projecting outwardly from the'frame portion 37. lt will thus be seen that the parts 36, 39, 41, 42, and 43 form a pivotal mounting for the cutter bar. The bearing portion 37 is formed integral with a frame section 44 detachably secured by screws 45 to the main cutter head frame. The frame sectionV 44 has a cylindrical portion 46 within which a cylindrical portion 47 of the main cutter iead frame projects. As shown, the hub portion of the spur gear 28 is provided with clutchteeth 50 interlocked with clutch teeth 5 1' formed on a sleeve-like clutch member 52 supported by the shaft 30. Surrounding the clutch member 52 is a clutch member o3 clutched at 54 to a driving sleeve 55 keyed at 56 to the shaft 30. Surrounding the clutch members 52, 58 is a shiftable clutch member 57 having internal clutch teeth engaging theclutch teeth on the memberL 52 and connectible to the clutch teeth on the member 53. Slidably mounted in a bore 58 formed within the projecting cylin drical portion 47 of the main cutter head frame is a clutch shipper member 59 connected to the clutch member 57. The means for shifting the clutch member 57 into and out of engagement with the clutch teeth on the clutch member 53 herein comprises (as indicated in dotted lines in Fig. 3) a lever 60 pivoted at 61 on the main cutter head frame and pivotally connected at 62 to upstanding ears formed integral with the clutch shipper member 59. The opposite end of the lever 60 is pivotally connected at 63 to a link 64 in turn pivotally connected at 65 to a crank or pivoted arm 66 secured to a transverse operating shaft 67. As shown in Figs. 1 and 2, the operating shaft 67 has secured thereto at its opposite ends at opposite sides of the cutter head suitable operating' handles 68. Again referring to the cutter chain driving mechanism it will be noted that the shaft 30 is journaled in a ball bearing 70 supported by the frame section 44. Also supported by the frame section is a packing carrying ring 71 engaging the hub of the cutter chain sprocket 32 and thereby preventing access of detrimental foreign mattei' to the rotat- A CTI ing 18, 19, spur gearing 27, 28, and the main cutter driving shaft 30 andthat the cutter chain may be connected to ordisconnected from the motor at will. The iinproved mechanism for rotating the head about its axis and for swinging the cutter bar about its pivotal axis will hereinafter be described.

The improved transmission mechanism 7 for driving the truck wheels to effect propulsion of the apparatus bodily along4 the mine trackway at a slowcutting speed and at a higher transport speed herein comprises' a spur pinion 72 rigidly fixed to the rear endof and rotatable with the armature shaft 8 of the motor. This ainion meshes with an intermediate gear 73 ixed to a horizontal shaft 74 suitably journaled within the machine frame. This gear 73 m-eshes with a spur gear 75 fixed to a parallel shaft 7 6 likewise journaled within the machine frame. Herein formed integral with the shaft 76 is a bevel pinion 77 meshing with a bevel gear 78 rigidly fixed to a transverse horizontal shaft 79 suitably journaled on the machine frame. suitably secured to the shaft 7 9 is a gear 80 meshing, as shown in Fig. 12, with a spur gear 81 fixed to a horizontal shaft 82 arranged parallel with and above the shaft 7 9 and likewise journaled on the frame. The shafts 79, 82 have respectively. secured thereto intermediate their ends fast and slow speed worms 83 and 84 meshing respectively with worm wheels 85 and 86 coaxially arranged and rotatable about avertical axis. Coaxially arranged with the worm wheels 85, 86 is a vertical shaft 87 carryino` a spur pinion 88. Carried within the worm wheels 85, 86 respectively arefriction clutches 89 and 90 of a Well known design and these clutches are adapted to be selectively applied by suitable operator-controlled pivoted shipper mechanism 91 to effect drive of the spur pinion 88 at a slow speed in one direction and at a fast speed in the opposite direction;

The spur pinion 88 meshes with a llarge spurv gear 92 keyed to a vertical shaft 93 suitably journaled on the frame of the machine. As

similar plural 'speed worm gearing and the 8 friction controlling clutches therefor, together with a similar type of operator-controlled shipper mechanism for the clutches,

are clearly described in my copending application, Ser. No. 136,446, filed Sep. 20, 1926, further detailed description of the same is herein submitted to be unnecessary.

Referring more particularly to VFig-4 itV will be noted that the large spur O'ear 92 meshes with a spur gear 94 keyed to a vertical shaft 95 arranged at the rear of and parallel with 'the' shaft 93. The shaft 95 is journaled in b all bearings 96`supported by` a housing 97 rigidly secured tothe `rear endof the machinev frame 4 and housing the reversible k.transmission mechanism for driving the truck wheels. v The lower end of the shaft 95 has keyed thereto a bevel gear 98 meshing asrshown in Fig. 7, with oppositely rotating reverse bevels 99 and 100. rl-he reverse bevels are respectively journaled onbearing sleeves 101 supported by a transversely extending horizontal hollow main driving shaft 102 journaled'in ball bearings 103 suitably carried by the housing 97. In this instance, the hub portions of the bevel gears 99 and 100 are respectively provided with clutch teeth 104, 105 which are selectively connectible to clutch teeth 106 `carried by the shaft `102. A shiftable clutch member 107 is employed for alternatively connecting the clutch teeth on the` reverse bevels to the'clutch teeth on the shaft. This clutch member is adapted to be shifted axially in opposite directions by a shipper yoke 108 fixed to a horizontal operating shaft 109 carrying at its rear end a suitable operatinglever 110. It will thus be seen that one or the other of the reverse bevels 99, 100 may be connected to the shaft 102 to thereby effect rotation of the latter in one direction or the other as desired. Fixed to one end of the shaft 102 is a clutch member 111 having clutch teeth engaging the clutch teeth of a shiftable clutch member 112 secured to a transverse operating rod 113 extending axially through the hollow shaft 102. As shown in Fig. 8, this rod 113 carries spring pressed plungers engageable with spaced notches in the shaft 102 for maintaining therod 113 vin its different adjusted positions. An operating handle 114 secured to the rod 113 is employed for shifting the clutch member 112 axially to bring the teeth thereof into engagement with clutch teeth 115 formed integral with a chain driving sprocket 116. This sprocket 116 is journaled on a bearing sleeve also supported by the transverse shaft 102 and is connected by an endless chain 117 (see also Fig. 2) to a sprocket 118'suitablyfixed to the rear axle of the truck. The axles for the front and rear truck wheels are connected toether by a chain and sprocket connection 119. ItV will thus be evidentthat when one or the other of thev reverse bevels 99, 100 is connected to the shaft 102 and when the clutch member 112 isshifted to `connect the clutch members 111, 115 and upon suitable application of the speed controlling frictions 89, 90 the truck wheels may be drivenv in one direction or the `other at either a` slow or a relatively high speed.

The `.improved mechanism for effecting rotation of the .cutter head and forV swinging the cutterbar about its pivot will now be described. 'As shown in Fig. 7 the shaft 102 has-fixed thereto at the end thereof oppQSitefroni the clutch member 111 a similar clutch member 120 having clutch teeth oonnectible by a shiftable clutch member 121 to clutch teeth 122 vformed on the hub of -a chain driving sprocket l123. An operating handle 124, similar to the handle 114 for the clutch member 112, vis employed for shifting the clutch member 121 into its'connected or released position. The chain driving sprocket 123 drives through a chain and sprocket connection 125 a similar chain and sprocket connection 126 which is connected to a chain sprocket 127 (see Fig. 9) keyed to a transversely extending horizontal shaft 128 journaled in ball bearings 129 suitably carried within the frame section 17 of the machine body. This shaft has herein preferably formed integral therewith a worm 130 meshing with a worm wheel 131 surrounding the axial line of the rotatable cutter head and rigidly fixed by keys 132 to a chain sprocket 133, the worm wheel being journaled on the sleeve-like bearing portion 23 of the cutter carrying head 22. As illustrated, engaging this chain sprocket 133 is an endless flexible transmission element herein in the form of a loose-link chain 134 and constituting the final transmission element for effecting head rotation and for swinging the cutter bar about its pivotal axis. The pitch line speed of this chain is appropriate for bar swing, at a cutting speed. The chain 134 passes over the upper surface of the chain sprocket 133 around the angularly disposed guide sprockets 135 offset laterally from the head axis and suitably journaled on the cutter head frame, the chain extending forwardly around these guide sprockets through openings 136 formed in the cutter head frame and forwardly around an annular groove 137 formed on the external periphery of the member 39 secured to the cutter bar 34.

Means is also provided for locking the rotatable cutter head to the relatively stationary machine body and herein comprises a stationary locking ring 138 secured at 139 to the sleeve-like bearing portion 16 of the frame section 17. Engageable with the cylindrical outer surface of the locking ring 138 are a plurality of toothed locking members 140 having adjusting screws 141 threadedly connected to the head frame. VIt will thus be seen that when the screws 141 arel ing member 142 having chain engaging teeth 143 and carried-by a projecting boss 144.

herein formed integral with the member 39. The locking member 142 is held against displacement from the boss by means of pins 145 engaging opposite sides thereof and secured to the boss. Threadedly connected vwithin the boss 144 is an adjusting screw 146 for effecting adjustment of the locking member 142. Also threadedly connected within the boss 144 is an adjusting screw 147 engageable with a toothed locking member 148 engageable with the cylindrical surface of a flange 149 formed integral with the frame section 44 secured to the main cutter head frame. lFrom the foregoing description it isevident that when the adjusting screws 146, 147 are adjusted to move their respective locking members inwardly, the endless chain 134 is held -against movement relative to the member 39 and the latter is in turn rigidly locked against rotative movement relative to the cutter head frame. Upon release of the locking members 140, and when the clutch 120, 121, 122 is connected, the chain sprocket 133 may be rotated by the worm wheel 131 causing the sprocket 133 to act on the endless chain 134 which is then held against movement relative to the cutter head and as a result the cutter Vhead is rotated about its axis, the pull of the chain 134 on the laterally located guide sprockets 135 carried by the cutter head effecting rotation. Then the locking member 148 is released, the locking member 142 moved into its locking position connecting the chain 134 to the cutter bar 34, and the locking members 14() are moved into their locking position thereby holding the cutter head against rotation, upon rotation of the sprocket 133 the endless chain 134 is drawn in thereby effecting swinging movement of the cutter bar about its pivot relative to the cutter head frame. Upon suitable application of the friction speed controlling clutches 89, 90 and the reverse controlling clutch 107 it is obvious that vthe cutter head and cutter bar may be moved about their respective pivotal axes at either a fast speed or a slow speed in opposite directions. It will be noted that the rear truck axle is provided with a frictional braking device 150 (see Fig. 1) having usual controlling means including an operating lever 151 and this braking device is adapted to hold the apparatus stationary at certain times during the cutting operation and to control ymovement of theV apparatus along an inclined trackway.

The operation of the improved mining apparatus is as follows: rlhe mining apparatus is propelled along the mine entry by the truck wheels at a fast speed under the control of the fast speed friction clutch 89. It will be understood that at that time the reverse bevel 99 is connected to the shaft- 102 by the clutch member 107 and that the clutch member 112 is in its connected position, the truck wheels being driven at a fast transport speed by themotor pinion 72 through gearing 73, 75, bevel gearing .77, 78, worm gearing 83, 85, spur gearing 88, 92, 94, bevel gearing 98, 99, shaft 102, and chain and sprocket connections 116, 117, 118, and 119.4

If it is desired to propel the apparatus rearwardly at a high speed the bevel gear 99 is disconnected from thedriving shaft 102 and the clutch member 107 slid into engagement with the clutch teeth on the gear 100 thereby reversing the drive. VJ hen the working face is reached and it is desired to insert the hori- Zontal cut in the coal face the locking member 148 is moved into its released position, and the locking member 142 moved into its locking position connecting the chain 134 to the cutter bar 34, and the cutter head is rigidly locked to the machine frame by the locking members 140. The clutch 120, 121, 122 is then connected and the reverse bevel 99 is connected to the shaft 102 by the clutch 107 and upon suitable application of the/fast speed friction clutch: 89 the cutter bar 34 is swung Jtransversely in its plane to a point adjacent the right'hand rib, the bar being swung by the motor at a fast bar positioning speed through spur gearing 72, 73, 75, bevel gearing 77, 78, worm gearing 83, 85, spur gearing 88, 92, 94, bevel gearing 98, 99, shaft 102, chain and sprocketJ connections 123, 125, 126, and 127, worm gearing 130,

131, the sprocket 133, and the endless chain 134 connected to the cutter bar 34. The cutter bar is thereafter locked against movement relative to the cutter head frame by the locking member 148, the lock 142 and clutch 121 are released, andthe clutch 112 is then connected and upon connection of reverse bevel 100 and application of the slow speed friction clutch 90` the apparatus is moved forwardly bodily along the traclrway at a slow cutting speed through the slow speed worm gearing 84, 86 of the transmission, thereby effecting sumping of the cutter bar within the coal. The brakelO is then set and the locking member 148 is moved'into its released position, the locking member 142 moved into its locking position, and upon the connection of clutch 121 the cutter bar is swung through the slow speed worm gearing 84, 86 of the transmission and the connections including sprocket 133 and chain 134 about its pivot at a cutting speed to effect a transverse swinging cut, the brake 150 thereafter being released. The cutter bar is thereafter locked to the cutter 'head frame and the apparatus propelled bodily rearwardly along the traclrway at a cutting speed to effect its withdrawal cut. If it is desired to insert a vertical or shear cut in the coal face the locking members 142, 148 are moved into their locking position and the locking members 140 are released and upon connection of the clutch 121 with clutch 89 loaded and bevel 99 driving, the chain sprocket 133 acts onthe chain 134 which is then fixed to the cutter head thereby causing the cutter head to be rotated about its axis, l

the pull of the chain on the laterally located guide sprockets 135 carried by the cutter head effecting head rotation. Wvheu the cutter bar has assumed a position in a vertical plane, i. e., in its shearing position, the bar is sumped Vinto the coal, swung downwardly, and then withdrawn from the coal in a manner substantially similar to that described in connection with the horizontal cut. It will also be noted that the cutter head may be rotated about its axis to position the cutter bar in a plurality of intersecting planes about the head axis, it being possible to position the cutter bar in a vertical plane at either side of the central longitudinal vertical plane of the apparatus er into any intermediate planes about the head axis.

It is also evident that. the cutter bar may be swung about its pivot in any of the aforesaid adjusted positions of the cutter head. Otier operations and uses of the improved mining apparatus will be clearly apparent to those skilled in the art.

As a result of the invention it will be noted that improved adjustable lrerf cutv ting mechanism is provided whereby the cutter bar maybe moved into ya plurality of intersecting planes and having improved and simplified driving connections whereby the cutting mechanism may be adjusted and the cutter bar swung about its pivot. It will further be noted that improved plural speed reversible truck driving mechanismV is prof.

vided whereby the apparatus may be moved along the trackwayin either direction at a relatively slow cutting speed or at a relatively high transport speed. This improved truck driving mechanism has associated therewith improved mechanism for adjusting and swinging the cutter bar. It will further be noted that the adjusting means for moving the cutter bar in a plurality of planes and for swinging the cutter bar about its pivotal axis is of an exceedingly simple construction, a single final flexible transmission element being employed instead ofthe usual geared transmission thereby greatly decreasing the cost and weight of the machine, together with the resultant decrease in repair expense due to the elimination ofv complicated driving connections.

While there is in this application specifically described'one embodiment which the invention lnay assume in practice, it will be understood that this embodiment is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is: r

l. ln a mining apparatus, the combination of a body, a cutter carrying head rotatably mounted on said body and having a pivoted cutter bar mounted thereon, a motor in said body, and mechanism driven by said motor for swinging said bar about its pivot relative to said head in any adjusted position of the latter about its axis comprising a power transmitting member rotatable relative to said head and surrounding the head axis, said member having an annular bearing portion and said head having a circular external peripheral portion which said annular bearing portion surrounds, and operative connections between said rotatable member and said cutting bar for transmitting a swinging force from the former to the latter.

2. In a mining apparatus, the combina-- tion of a body, a cutter carrying head rotatably mounted on said body and having a pivoted cutter bar mounted thereon, a motor in said body, and mechanism driven by said motor for rotating` said head and for swinging said bar about its pivot relative to said head in any adjusted position of the latter about its axis comprising a power transmitting member rotatable relative to said head and surrounding the head axis, said member having an annular bearing portion and said head having a circular external peripheralportion which said annular bearing portion surrounds, and operative connections between said rotatablek member and said. head and cutter bar for transmitting a moving force from said member to said head or to said bar.

3.` In a mining apparatus, the combination of a body, a cutter carrying head rotatably mounted on said body and having a pivoted cutter bar mounted thereon, a motor in said body, and mechanism driven by said motor for lswinging said bar about its pivot rela-- tive to said h ad in any adjusted position of the latter about its axis comprising a power transmitting member rotatable relative to saidv head and surrounding the. head axis, and flexible swinging means connected to said cutter bar and having anA intermediate portion engaging said rotatable member tor actuation by the latter.

t. In a mining apparatus, the combination of a body, a cutter carrying head rotatably mounted on said body and having. a pivoted cutter bar mounted'thereon, a motor in said body, and mechanism driven by saidI motor for rotating said head and for swinging said bar' about its pivot relative to said head in any adjusted position of the latter about its axis.'` comprising a power transmitting member rotatable relative toI said head andA surrounding the head axis, andv flexible swinging means connected to said cutterr bar and having an intermediate portion engaging said; rotatable member for actuation bythe latter.

5. Inra miningfapparatumthe combination of a body, a cutter carrying head having a portion by means of which it is rotatably mounted on said body and having a pivoted cutter bar mounted thereon, a motor in said body, and mechanism driven by said motor for rotating said head and for swinging said cutter bar about its pivot relative to said head in any adjusted position of the latter about its axis comprising a power transmitting memberv rotatable relative to said head and surrounding that portion of said head by which said head is rotatably mounted on said body, operative connections between said rotatable member and said cutter bar for transmitting a swinging force from the former to the latter, andv means for holding said head against rota-tion during bar swing.

6. Ina mining apparatus, the combination of a body, a cutter carrying head rotatably mounted on said body and having a pivoted cutter bar mounted thereon, a motor in said body, and mechanism drivenby said motor for rotating said head and for swinging said cutter bar about its pivot relative to said head in any adjusted position of the latter about its axis comprising a power transmitting member rotatable relative to lsaid head and surrounding the head axis, iiexible swinging means connected to said cutter bar and having an intermediate portion Vengaging said rotatable member for actuation thereby, and means for holding said head against rotation during bar swing.

7. In a mining apparatus,.the combination of a body, a cutter carrying head having a portion by means of which'A it is rotatably mounted on said body and'having a pivoted cutter bar mounted thereon, a motor in said body, and mechanism driven by said motor for rotating said head and for swinging said cutter bar about its pivot relative to said head in any adjusted position of the latter about its axis comprising a power transmitting member rotatable relative to saidl head and surrounding that portion of said head by which said head is rotatably mounted on said body, operative connections between said member landsaid head and cutter bar for transmitting amoving force from said member to said head or to said bar, and means for holdingv said cutter bar against swinging movement relative to said headv during head rotation.

8. In a mining apparat-us, the combination of a body, a cutter carrying head rotatably mounted on said body and having a pivoted cutter bar mounted thereon, al motor in said body, and mechanism driven by said motor for rotating said head1 and for swinging said cutterV bar about its pivot relative to said head' in any adjustedposition of the latter about its axis comprising. a power transmitting'member rotatable-,relative to said head and surrounding. the head axis, flexible Vconnections.- including, atlexible element'. connected to said head and bar and having an intermediate portion engaging saidrotatable member for actuation by the latter, and means for holding said cutter bar against swinging movement relative to said head during head rotation.

9. In a mining apparatus, the combination of a body, a cutter head rotatably mounted on said body and having a pivoted cutter bar mounted thereon, a motor in said body, and mechanism driven by said motor for rotating' said head and for swinging said cutter bar about its pivot relative to said head in any adjusted position oi the latter about its axis comprising a rotatable power transmitting member, and a flexible transmission element connected between said member and said head and cutter bar and actuated by said member and adapted to circulate relative to said head and bar when disconnected therefrom, means orfoperatively connecting said cutter bar to said flexible element, and means for holding said head against rotation during bar swing.

l0. In a mining apparatus, the combinationo'f a body, a cutter head rotatably mounted on said body and having a Jivoted cutter bar mounted thereon, a motor in said body, and mechanism driven by said motor for rotating said head and for swinging said cutter bar about its pivot relative to said head in any adjusted position of the latter about its axis comprising a rotatable power transmitting member, a flexible transmission element connected between said member and said head and cutter bar and actuated by said member and adapted to circulate relative to said headand bar when disconnected therefrom, means for operatively connecting said cutter bar to said flexible element, and means for holding said cutter bar against swinging movemel. relative tol said head during head rotation.

11. In a mining apparatus, the combination ot'a body, a cutter carrying head having` a portion by means of which it is rotatably mounted on said body and having a pivoted cutter bar mounted thereon, a motor in said body, and mechanism driven by said motor for rotating said head and for swinging said cutter bar about its pivot relative to said head in any adjusted position of the latter about its axis comprising a power transmitting member rotatable relative to said head and surrounding that portion of said head by means of which said head is rotatably mounted on said body, operative connections between said member and said head and cutter bar for transmitting a moving force from said member to said head or to said bar, means for holding said head against rot-ation during bar swing, and means for holding said bar against swinging movement relative to said head during Vhead rotation.

l2. In a mining apparatus, the combination of a body, a cutter carrying head rotatably mounted on said body and having a pivoted cutter bar mounted thereon, a motor in said body, and mechanism driven by said motor for rotating said head and for swinging said cutter bar about its pivot relative to said head in any adjusted position of the latter about its axis comprising a power transmitting member rotatable relative to said head and surrounding the head axis, liexible connections including a flexible element connected to said head and bar and having an intermediate portion engaging s id rotatable member for actuation by the latter, 'means for holding said head against rotation during bar swing, and means for holding said bar against swinging movement relative to said head during hea-d rotation.

13. In a mining apparatus, the combination of a body, a cutter carrying head rotatably mounted on said body and having a pivoted cutter bar mounted thereon, a motor in said body, and mechanism driven by said mot-or for alternatively rot-ating said head and for swinging said cutter bar about its pivot relative to said head in any adjusted position of the latter about its axis comprising a power transmitting member rotatable relative to said head and surrounding the head axis, said member having an annular bearing portion and said head having a circular external peripheral portion which said annular bearing portion surrounds, and operative connections between said rotatable member and said head and cutter bar for transmitting a moving torce from said member to said head or to said bar.

le. In a mining apparatus, the combination of a body, a cutter carrying head rotatably mounted on said body and having a pivoted cutter bar mounted thereon, a motor in said body, and mechanism driven by said motor for alternatively rotating said head and for swinging said cutter bar about its pivot relative toY said head in any adjusted position of the latter about its axis comprising a power transmission Vmember rotatable relative to said head and surrounding the head axis, and flexible connections including a flexible element connected to said head and bar and having an intermediate portion engaging said rotatable member for actuation by the latter.

15. In a mining apparatus, the combination of a body, a cutter carrying head rotatably mounted on said body and having a pivoted cutter bar mounted thereon, a horizontal' motor in said body having `its power shaft extending longitudinally of the apparatus, mechanism driven from one end of said motor for actuating said cutter bar, mechanism driven from the opposite yend of said motor for efiiecting rotation or" said head and for swinging said bar about its pivot relative to said head in any adjusted position of the latter about its axis coil*- prising a power transmitting member rotatable relative to said head and surrounding the head axis, and flexible swinging means operatively connected to said head and cutter bar and having an intermediate portion 'engaging said rotatable member for actuation by the latter.

16. In a mining apparatus, the combination of a bot y, a cutter carrying head rotatably mounted on said body and having a pivot-ed cutter bar mounted thereon, a horizontal motor in said body having its power shaft extending longitudinally of the apparatus, mechanism driven from the front end of said motor for actuating said cutter bar, mechanism driven from the rear end of' said motor for effecting rotation or" said head and forswinging said bar about its pivot relative to said head in any adjusted position of the latter about its axis comp ising a power transmitting member rotatable relative to said head and surrounding the head axis, and flexible swinging means operatively connected to said head and cutter bar and having an intermediate portion engaging said rotatable member for actuation by the latter.

17. In a mining apparatus, the combination of a body, lierf cutting mechanism carried thereby including a pivoted cutter bar swingable in a vertical plane to cut a vertical kerf, a motor, and mechanism driven by said motor for swinging said cutter bar about its pivot comprising a power transmitting member disposed adjacent said cutting mechanism and rotatable about a longitudinal axis, and iiexible transmission means having portions connected to said bar and an intermediate portion engaging said rotatable member for actuation by the latter.

18. In a mining apparatus, the combination of a body, lrerf cutting mechanism carried thereby including a pivoted cutter bar swingable in a vertical plane to cut a vertical lrerf, a motor, and constantly operative means driven by said motor for swinging said cutter bar about its pivot in opposite directions comprising a power transmitting member disposed adjacent said cutting mechanism and rotatable about a longitudinal axis, and flexible transmission means having portions connected to said bar and an intermediate portion engaging said rotatable member for actuation by the latter.

19. In a mining apparatus, the combination of a body, lref cutting mechanism carried thereby including a pivoted cutter bar swingable in vertical or in horizontal planes to cut vertical and horizontal kerfs, a motor, and means driven by said motor for swinging. said bar about its pivotcomprising a power transmitting member disposed adjacent said cutting mechanism and rotatablev about a longitudinal axis, and flexible swinging means having portions connected to said cutter bar and an intermediate portion engaging said rotatable member for actuation by the latter.

20. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter carrying head mounted on said body and having a pivoted cutter bar mounted thereon, a motor, and mechanism driven by said motor for swinging said cutter bar about its pivot relative to lsaid head when said head is held against rotating movement including a power transmitting member rotatable relative to said head and surrounding the head axis, and flexible bar swinging means operatively connected to said head and bar and having an intermdiate portion engaging said rotatable member for actuation by the latter.

21. In a mining apparatus, the combination of a body, lrerf cutting mechanism carried thereby including a pivoted cutter bar swingable relative to said body, and motor operated devices for eiiecting bar swing including a rotatable power driven member disposed at the end of said body adjacent said lrert cutting mechanism, a flexible transmission element engaging said rotatable member and actuated thereby and operatively connected, to said cutter bar, and means operable at will for disconnecting said cutter bar from said flexible element.

22. In a mining apparatus, the combination of a body, kerf cutting mechanism carried thereby including a pivoted cutter bar swingable relative to said body, and motor operated devices for effecting bar swing including a rotatable power driven member disposed at the end of said body adjacent said kerf cutting mechanism, an endless flexible transmission element engaging said rotatable member and actuated thereby and operatively connected to said cutter bar, and means operable at will for disconnecting said cutter bar from said flexible element.

23. In a mining apparatus, the combination of a body, kerf cutting mechanism carried thereby including a pivoted cutter bar swingable relative to said body, and motor operated devices for efecting bar swing including a rotatable power' driven member disposed at the end of said body adjacent said kerf cutting mechanism, a flexible transmission element engaging said rotatable member and actuated thereby and operatively connected to. said cutter bar, and means for disconnecting said cutter bar from said flexible element at will.

2li. In a mining apparatus, the combination of a body, lerf cutting mechanism carried thereby including a pivoted cutter bar swingable relative to said body, and motor operated devices for effecting bar swing including a rotatable power driven member disposed on a horizontal longitudinally extending axis at the end of said body adjacent said kerf cutting mechanism, and an endless iiexible transmission element engaging said rotatable member and actuated thereby and operatively connected to said cutter bar.

25. In a mining apparatus, the combination of a body, lrerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for rotating said head and for swinging said kerf'cutter including a common transmission element operatively connectible to said head and kert1 cutter to rotate the former and swing the latter, said kerf cutter being connected to said element at all times during motor operated head rotation `by a direct attachment which precludes any relative movement between said element and said kert cutter, and means for disconnecting said kerf cutter from said element at will and for connecting said kerf cutter to said transmission element irrespective of the position of said transmission element relative thereto.

26. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for rotating said head and for swinging said ker cutter in cluding a common transmission element operatively connectible to said head and kerf cutter to rotate the former and to` swing the latter, said lierf cutter being connected to said element by a direct-attachment which precludes any relative movement between said element and said lerf cutter and being held stationary relative to said head at all times during motor operated head rotation, and means for releasing said kerf cutter from said element at will and for connect- A ing said kerf cutter to said transmission element irrespective of the position of said transmission element relative thereto.

27. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto, and

motor operated devices disposed wholly at the end of the apparatus adjacent said cutter head for rotating said head and for swinging said kerf cutter including a common transmission element operatively connectible to said head and kerf cutter to rotate the former and to swing the latter, said lieri' cutter being connected to said element by a direct attachment which precludes any relative movement between said element and said kerf cutter and being held stationary relative `to said head at all times during motor operated head rotation, and devices carried bysaid kert cutter for disconnecting said kei-it cutter from said element and for holding said kert' cutter against swinging movement relative to said head.

28. In a mining apparatus,the combination ol a body, kerl. cutting mechanism including a cutter head mounted on saidbody for rotation about a longitudinal axis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto, motor operated devices for rotating said head and for swinging said kerfcutter-including a common transmission element operatively connectible to said head and kerf cutter to rotate the former and to swing the latter, said ker cutter being connected to said element at all times during motor operated head rotation, said element when so connected being completely immovable relative to said lrerfcutter, and said element having movement relative to said head and kerf cutter while said head and lrerf cutter remain stationary, and' means for operatively connecting said lerf cutter to said transmission element irrespective of the position of said transmission element relative thereto.

29. In a mining apparatus, the combination of a body, kerf cutting mechanism including acutter head mounted on said body for rotation about a longitudinal axis and a lerf cutter pivotally mounted on said head for swinging movement relative there to, and motor operated devices for rotating said head and for swinging said keri' cutter including a common transmission element operatively connectible to said head and kerf cuttter to rotate the former and to swing the latter, said motor operated ydevices being operative to effect movement of said transmission element relative to said m head and kerrt cutter when disconnected therefrom and while'maintaining a predetermined relation thereoil relative to said head and said kerf cutter being connected to said element at all times during motor 115 operated head rotation, said element when so connected being completely immovable relative to said kerif cutter, and means carried by said head for connecting the latter to or disconnecting the same from said element at will.

30. ln a mining apparatus, the combination oi `a body, kerf cutting mechanism includingacutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for rotating said head and for swinging said kerf cutter including a common transmission element 13g izo operatively connectible to said head and kerf cutter to rotate the former and to swingv the latter, said motor operated devices being operative to effect movement of said transmission element relative to said head and kerf cutter when disconnected therefrom and While maintaining a predetermined relation thereof relative to said head and said kerf cutter being connected to said element by a direct attachment whicli precludes any relative movement between said element and` said ker cutter and being held stationary relative to said head at' all times during motor operated head rotation, and` means carriedy by said head for connecting thel latter to or disconnecting the same from said element at will.

31. n a mining apparatus, the combination: of. abody, lrerf cutting mechanism including a cutter head mounted on said body for rotation; about a longitudinal axis and a korf cutter lpivotally mounted .on said head tor swinging movement relative thereto, and motor operated devices for rotating said head` and Jfor swinging said lerfI cutter including a commonf transmission element operatively connectible to said head and l'rerf cutter to rotate the former and to swing the latter, said motor operated devices being operative to effect movement of sai-d transmission element relative to said head and. lterli cutter when disconnected therefrom: andi while' maintaining a predeterminedrel'ation thereof relative to said head and said kortl cutter being connectedy to saidelement at alll times during motor operated head rotation by a: direct attachment whichl precludes any relative movement between said element andi saidv lerf cutter, and devices carried said cutter leasable-at willi for holding the latter against rotation about its axis during swinging of said lrerf cutter.

32; lna mining apparatus, the combination of a body, lie-rf cutting mechanism including-a cutter head mounted on said body for rotation about a longitudinal axis an(L a lierf:v cutter ivotally mounted on head forswinging movement relativefthereto, and motor operated devices for rotating said head? andi for swingingv said kerf cutter including a common transmission element operatively connectible to said head and kerl cutter to rotate-the former and to swing the latter, saidf motor opera-ted devices being operative to etlect movement oit' said transmission element relativev to said head and lrerf cutter when disconnected therefrom and while maintaining a. predetermined relation thereoiE relativeto said head and said korf cutter being connected to said element at all' times during motor operated head rotation, and! devices releasab'le; at will' for connecting said ker cutter t'ol said element by a direct attachment which precludes any relative 'Leie head andy removement between said. element and: said l'rerf cutter and for holding said lreri' cutter aga-inst swinging movement relative to said head' duri-ngL head rotation. v

ln a mining apparatus, the combination of a5 body, korf cutting mechanismv including cutter head mounted on said body for rotation about a longitudinal axis and akerf cutterpi-votally mounted on said head for swinging movement relative thereto, and motor operated devices disposed wholly at the end oi the apparatus adjacent said cutter head 'for rotating said head and for swinging said' lrerf cutter including a common transmission element operatively connectible to said hea-d and-korf cutter to rothe former and to swing the latter, said kerlI cutter being connected to said element at all times during motor operated hea-d rotation, and devices releasable at will for connecting said kerl' cutter toV saidA element by a direct attachment which precludes any relative movement between said element and said lrerinA cutter and Ytor holding said lerf cutter against swinging movement relative tosaid head during head rotation, said kerl cutter holding devices being released and said cutter head held against rotation about its axis during swinging of said ker'f cutter.

in a: mining apparatus, the combination oi? a body, korf cutting mechanism including av cutter headmounted onl saidv body for rotation about a longitudinal axis and leert cutter pivotally mounted on said head Jor swinging movement relative thereto, andl motor operated devices for rotating said cutter head and for swinging said kort cutter, said head rotating devices and said kerii cutterl swinging devices including a common iiexible'transmission element connectible to both said-head and lrerf cutter, said flexible element being adapted-to circulate relative to said head and kerif' cutter while said 'head and ker-'f cutter are disconnected therefrom.

35, na mining apparatus, the combination of a body, ker't` cutting mechanism including a cutter head mounted on said body for rotation about a longitudinaly axis and a kerlE cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for rotatingsaid cutter head and for swinging said leert cutter, said head rotating devices and'said lerf cutter swinging devices including common endless flexible transmission element adapted to circulate relative to said hea d and kort cutter and connectible to both said head and kent cutter.

36. ln a mining apparatus, the combination of a body, ker'f cutting mechanism including acutter head mounted on said body for rotation about a longitudinal axis and a korf cutter pivotally mounted on said head for swinging movement relative thereto, and

ion

'Leiaeoa motor operated devices for rotating said cutter head and for swinging said lerf' cutter, said head rotating devices and said kerf cutter swinging devices including a common endless flexible transmission element connectible to both said head and kerf` cutter, said endless flexible transmission element being adapted to circulate relative to said head and lrerf cutter while said head and kerf cutter remain stationary and operable to effect either head rotation or swinging of said kerf cutter at will.

37. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a lrerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for rotating said cutter head and for swinging said kerf cutter, said head rotating devices and said kerf cutter swinging devices including a power driven rotatable member having its axis alined with the head axis and a cooperating common flexible transmission element to which both said head and kerf cutter are coiinectible at will, said flexible element being adapted to circulate relative to said head and lrerf cutter when disconnected therefrom.

38. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and kerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for rotating said cutter head and for swinging said kerf cutter, said head rotating devices and said herrn cutter swinging devices including a power driven rotatable member having its axis alined with the head axis and a common endless flexible element adapted to circulate relative to said head and kerf cutter and to which both said head and lerf cutter are connectible at will.

In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a lerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for rotating said cutter head and for swinging said lrerf cutter, said head rotating devices and said kerf cutter swinging devices Aincluding a power driven rotatable member having its axis alined with the head axis and a. cooperating common endless flexible transmission element to which both said head and kerf cutter are connectible, said exible transmission element being adapted to circulate relative to said head and kerf cutter while said head and kerf cutter remain stationary and operable to effect either head rotation or kerf cutter swing at will.

40. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a lrerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for effecting head rotation and swinging of said kerf cutter including a rotatable power driven member and a cooperating endless flexible transmission member to which both said head and kerfccutter are connectible, the orbit of said flexible element maintaining a uniformity in shape during head rotation.

4l. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for effecting head rotation and bar swing including a rotatable power driven member and a cooperating endless flexible transmission member adapted to circulate relative to said head and lerf cutter and to which both said head and kerf cutter are connectible, the orbit of said flexible element remaining unchanged during swinging of said kerf cutter.

42. In a mining apparatus, the combination of a body, lerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a lerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for effecting head rotation and swinging of said lrerf cutter including a rotatable power driven member and a cooperating endless flexible transmission member to which both said head and kerf cutter are connectible, the orbit of said flexible element maintaining a uniformity in shape during both head rotation and swinging of saidkerfl cutter.

4:3. In a mining apparatus, the combination of a body, kerf cutting mechanism including a kerf cutter pivotally mounted on said body for swinging movement vertically relative thereto to cut a vertical kerf, motor operated devices for effecting bar swing` including` a rotatable power driven member and a cooperating endless flexible transmission element connected to said member, the orbit of said flexible element remaining unchanged during swinging of said kerf cutter, and means for disconnecting said lierf cutter from said flexible element, said element being adapted to circulate relative to said kerf cutter while disconnected therefrom.

44. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto and having cutting appliances thereon, motor operated devices for rotating said head including a gear surrounding the head axis and operatively connected to said head, mechanism driven by said gear for swinging said kerf cutter about its pivot, and means forv actuating said cutting appliances while said gear remains stationary.

45. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and lrerf cutter pivotally mounted on said head for swinging movement relative thereto and having cutting appliances thereon, motor operated devices for rotating said head including a gear surrounding the head axis and operatively connected to said head, mechanism driven by said gear for swinging said lrerfl cutter about its pivot, means for connecting said gear to said head, said gear being disconnected from said head during swinging of said lerf cutter, and means for actuating said cutting appliances while said gear remains stationary.

46. In a mining apparatus, the combination of a body, lierf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a lrerf cutter pivotally mounted on said head for swinging movement relative thereto, motor operated devices for rotating said head about its axis including a final transmission element having a pitch line speed appropriate for swinging said kerf cutter at a cutting speed and ixedly connectible to said head to rotate the latter on said longitudinal axis and disposed wholly at the end of the apparatus adjacent and guided on said head, said element when so connected being completely immovable elatively to said head, and mechanism driven by said transmission element operative' when said element is disconnected from said head to effect swinging of said kerf cutter.

47. In a mining apparatus, the combination of a body, lrerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a lrerf cutter pivotally mounted on said head for swinging' movement relative thereto, motor operated devices for rotating said head about its axis including a final transmission elemcnt having a pitch line speed appropriate for swinging said korf cutter at a cutting speed and ixedly connectible to said head to rotate the latter on said longitudinal axis and disposed wholly at the end of the apparatus adjacent and guided on said head, said element when so connected being completely immovable relatively to imaged said head, mechanism driven by said transmission element operative when said element is disconnected from said head to effect swinging of said korf cutter, and means for holding said cutter head against rotation during swinging of said lierf' cutter.

48. In a mining apparatus, the combination of a body, lrerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a lrerf cutter pivotally mounted on said head for swinging movement relative thereto, motor operated devices for rotating said head about its axis including a final transmission element having a pitch line speed appropriate for swinging said lrerf cutter at a cutting speed and fixedly conectible to said head to rotate the latter on said longitudinal axis and disposed wholly at the end of the apparatus adjacent and guided on said head, said element when so connected being completely immovable relatively to said head, mechanism driven by said 'transmission element operative when said element is disconnected from said head to effect swinging of said kei-f cutter, and means for holding said lierf cutter against swinging movement relative to said head during head rotation.

49. In a mining apparatus, the combination of a body, lierf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter mounted on said head, motor operated devices including a worm wheel encircling the head axis and rotatable relative to said head, and means for connecting said head to said worm wheel to effect head rotation at will.

50. In a mining apparatus, the combination of a body, korf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a lrerf cutter pivotally mounted on said head for swinging movement relative thereto, motor operated devices including a worm wheel encircling the head axis and rotatable relative to said head, means for connecting said head to said worm wheel to effect head rotation at will, and means for operatively connecting said korf' cutter to said worm wheel to effect swinging movement of said kerf cutter.

5l. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivotally vmounted on said head for swinging movement relative thereto, motor operated devices including a worm wheel encircling the head axis and rotatable relative to said head, means for connecting said head to said worm wheel to effect head rotation at will, and means for operatively connecting said lerf cutter to said worm Wheel to effect swinging movement thereof, said cutter head being held against rotation during swinging movement of said kerf cutter.

52. In a mining apparatus, thek combination of a body, kerf cutting mechanism including a cut-ter head mounted on said bodyfor rotation about a longitudinal axis and a lrerf cutter pivotally mounted on said head for swinging movement relative thereto, motor operated devices including a Worm Wheel encircling the head axis and rotatable relative to said head, means for connecting said head to said Worm Wheel to effect head rotation at will, and means for operatively connecting said kerf cutter to said Worm Wheel to effect swinging movement thereof, said lrerf cutter being held against swinging movement relative to said head during head rotation.

53. In a mining apparatus, the combination of a Wheeled support adapted to run along a mine trackWay, kerf cutting mechanism adjacent the front end of said support including a cutter head mounted on said support for rotationabout a longitudinal axis and a kerf cutter mounted on said head, and motor operated devicesfor eifecting head rotation and driving said support Wheels including a transverse shaft disposed at the rear of said support, reverse mechanism co-axial with said shaft for effecting drive thereof selectively in opposite directions, mechanism driven by said shaft for rotating the head, and mechanism driven by said shaft for driving the support Wheels.

54. In a mining apparatus, the combination of a Wheeled support adapted to run along a mine trackivay, kerf cutting mechanism adjacent the front end of said sup-4 port including a cutter head mounted on said support forv rotation about a longitudinal axis and a kerfV cutter mounted on said head, and motor operated devices for effecting head rotation and driving said support Wheels including a transverse shaft disposed at the rear of said support, reverse mechanism coaxial With said shaft foreffecting drive thereof selectively in opposite directions, mechanism driven by said shaft for rotating the head, mechanism driven by said shaft for driving the support Wheels, and means for only alternatively connecting said mechanisms in driving relation With said shaft.

55. In a mining apparatus, the combination of a Wheeled support adapted to run along a mine traclrway, kerf cutting mechanism adjacent the front end of said support including a cutter head mounted on said support for rotation about a longitudinal axis and a kerf cutter mounted on said head, and motor operated devices for effecting head rotation and driving said support Wheels including a transverse shaft speeds, and mechanism driven. bv said shaft f for driving the support Wheels at such speeds.

56. In a mining apparatus, the combination of a Wheeled support adapted to run along a mine traclrway, lrerf cutting mech# anism adjacent the front end of said support including a cutter head mounted on said support for.rotation about a longitudinal axis and a kerf cutter mounted on saidV head, and motor operated devices for effecting head rotation and driving said support Wheels including a transverse shaft disposed at the rear of said support, reverse mechanism coaxial With said shaft for effecting drive thereof selectively in opposite directions, plural speed transmission mechanism for effecting rotation of said shaft at either a relatively high speed or a relatively low speed, mechanism driven by said shaft for rotating the head at such speeds, mechanism driven by said shaft for driving the support Wheels at such speeds, and means for only alternatively connecting said mechanisms in driving relation with said shaft.

57. In a mining apparatus, a portable support, kerf cutting mechanism carried by said support including a pivoted lrerf cutter sivingable relative to said support, and motor operated devices for swinging said lierf cutter about its pivot including a drive sprocket, an annular grooved member secured to said kerfcutter, an endless chain engaging said sprocket and guided in the groove on said annular member, and means for connecting said kerf cutter to said endless chain at Will.

58. In a mining apparatus, a portable support, kerf cutting mechanism carried by said support including a pivoted kerf cu` ter swingable relative to said support, and motor operated devices for swinging said kerf cutter about its pivot including a drive sprocket, an annular grooved member secured to said kerf cutter, an endless chain engaging said sprocket and guided in the groove on said annular member. and means for connecting said kerf cutter to said endless cham at Will comprising a cnam engaging member carried by said lierf cutter and` means for adjusting said member into and out of engagement With said chain.

59. In a mining apparatus` a portable support, kerf cutting mechanism carried by said support including a cutter head rotatable about a longitudinal axis and a kerf cutter pivotally mounted on said head `for swinging movement relative thereto, and motor operated devices for rotating said cutter head and tor swinging said lieri2 cutter about its pivot including a drive sprechet encireiing the head anis, an annular grooved member secured to said herr" cutter, an endless chain engagino` said sprocket and guided in the groove on said annular inember, means for connecting said l-:ert cutterl to said endless chain, means for locking said lerf cutter head against rotation about its aXis, and means for locking said hert cutter against swinging movement relative to said cutter head.

60. ln a mining apparatus, a portable support, kort cutting mechanism carried by said support including a cutter head rotatable about a longitudinal axis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for rotating said cutter head and for swinging said lrerif cutter about its pivot including a drive sprocket encircling the head axis, an annular grooved member secured to said herrP cutter, an endless chain engaging said sprocket and guided in the groove on said annular member, means for connecting said lerf cutter to said endless chain, means for locking said hert cutter head against rotation about its axis, and mea-ns for locking said lerf cutter against swinging movement relative to said cutter head, said lrert cutter locking means comprising an adjustable locking element carried by said ker cutter and adjustable into and out oil' engagement with an element of said cutter head.

6l. In a' mining apparatus, portable support, lrerf cutting mechanism carried by said support including a cutter head rotatable about a longitudinal axis and a kort cutter pivotally mounted on said head swinging movement rela-tive thereto, and motor operated devices for rotating said cutter head and for swinging said ker cutter about its pivot including a drive sprocket encircling the head axis, an annular grooved member secured to said hert cutter, an endless chain engaging said sprocket and guided in the groove on said annular member, means Yfor connecting said lier' cutter to said endless chain, means tor locking said hert cutter head against rotation about its axis, and means ior loclring said kerf cutter against swinging movement relative to said cutter head, said means torlocking said cutter head against rotation comprising an adjustable element carried by said cutter head and adjustable into and out oi" engagement with a relatively stationary portion of said support.

62. in a mining apparatus, a portable support having iront and rear wheel axles,

hert cutting mechanism carried by said support including Aa pivoted korf cutter movable relative to said support, and motor operated devices for swinging said kerf cutter' about its pivot including a rotatable driving element arranged coaXially with one ot said wheel axles.

63. In a mining apparatus, a portable support having front and rear wheel axles, kert cutting mechanism carried by said support including a cutter head rotatable on a longitudinal aXis and a pivot-ed kort cutter carried by said cutter head and swingable relative thereto, and motor operated devices for rotating said cutter head about its axis including a rotatable driving ele-l ment arranged coaXially with one of said wheel axles.

6a. In a mining apparatus, a portable support having front and rear wheel axles, hert cutting mechanism carried by said' support including a cutter' head rotatable on a longitudinal axis and a. pivoted korf cutter carried by said cutter head and' swingable relative thereto, and motor operatedl devices for rotating said cutter head and for swinging said korf cutter about its: pivot iincluding a rotatable driving element arranged coaxially with one of said wheel axles.

65. In a mining apparatus, a portable support, kerf cutting mechanism carried by said support including a cutter head rotatable about a longitudinal axis, and motor operated devices or effectingl rotation of said head about its axis comprising a rotatable power operated member surrounding the head aXis and' a flexible transmission element engaging said member for movement thereby and engaging said head at points oiiset from its axis of rotation and partially encircling said head' axis.

66. In a mining apparatus, the combination of a body, korf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal aXisand a lierf cutter pivotally mounted onsaid head for swinging movement relative thereto, and motorV operated devices for rotating said head and for swinging said ker @utter including a common transmission element operatively connectible to said head and hert cutter to rotate the former and to swing the latter, said kerf cutter being connected to said element at all times during motor operated head rotation by a direct attachment which precludes any relative movement between said element and said kerf cutter, and means for disconnecting said korf cutter from said element at will.

G7. ln a mining apparatus, the combination orp a body, kerity cutting mechanismincluding a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operateddevices for rotating said head and for swinging said lierf cutter including a common transmission element operatively connectible to said head and kerf cutter to rotate the former and to swing the latter, said lierf cutter being connected'to said element by a direct attachment which precludes any relative movement between said element and said lrerf cutter and being held stationary relative to said head at all times during motor operated head rotation and means for releasing said lrerf cutter therefrom at will.

68. In a. mining apparatus, the combinatio-not a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a leril cutter pivotally mounted on said head for swinging movement relative thereto, and

rmot-or operated devices for rotating saidv head and for swinging said kerf cutter including a common transmission element operatively connectible to said head and kerf cutter to rotate the former and to swing the latter, said lerf cutter being connected to said element by a direct attachment which precludes any relative movement between said element and said kerf cutter and being held stationary relative to said head at all times during motor operated head rotation, and devices carried by said kerf cutter for disconnecting said kert cutter from said element and for holding said lierf cutter against swinging movement relative to said head.

69. In a mining apparatus, the combination of a body, hert cutting mechanism in` cluding a cutter head mounted on said body` for rotation about a longitudinal aXis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto', and motor operated devices for rotating said head and for swinging said lrerf cutter including a common transmission element op eratively connectible to said head and kerf cutter to rotate the former and to swing the latter, said lrerf cutter being connected to said element at all times during motor operated head rotation, said element when so connected being completelyimmovable relatively to said kerf cutter, and said element Ahaving movement relative to said head and kei-f cutter while said head and kerf cutter remain stationary.

' 70. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for rotating said head and for swinging said kerf cutter including a common transmission element operatively connectible to said head and kort' cutter to rotate the former and to swing the latter, said kerf cutter being connected to said element at all times during motor operated head rotation, said element when so connected being completely immovable relatively to said kerf cutter, and means carried by said head for connecting the latter to or disconnecting will.

71. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivotally mounted on said'head for swinging movement relative thereto, and motor operated devices for rotating said head and forA swinging said korf cutter including acommon transmission element operatively connectible to said head and kerf cutter to rotate the former and to swing the latter, said kerf cutter being connected to said element by a direct attachment which precludes any relative movement between said element and said kerf cutter and being held stationary relative to said head at all times during motor operated head rotation, and means carried by said head for connecting the latter to or disconnecting `the same from said element at will.

72. In a mining apparatus, the combination of a body, lierf cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated 'devices for rotating said head and for swinging said kerf cutter including a 'common transmission element, operatively connectible to said head and kerf cutter to rotatethe former and to swing the latter, said kerf cutter being connected to said element at all times during motor oper`l ated head rota-tion by aA direct attachment which precludes any relative movement bethe same from said element at,`

tween said Aelement and said ker cutter, and Y devices carried by said cutter head and releasable at will for holding the latter against rotation about its axis'during swinging of said kerf cutter.

73. In a mining apparatus, the combina-v tion of `a body, kerf cutting mechanismrincluding a cutter head mounted on said body for rotation about a longitudinalaxis and a hert-cutter pivotally mounted on said head for swinging movement relative thereto, and motor operated devices for rotating said head andfor swinging said lcerf cutter in cluding a common transmission element operatively connectible to said head and kerf 'I cutter to rotate the former and to swing the latter, said kerf cutter being connected to said element at all times during motor operated head rotation, and devices releasable at Vwill for connecting said kerf cutter 'to said element by a direct attachment which precludes any relative movement between for swinging movement relative thereto, and

motor operated devices for rotating said head and for swinging said kerf cutter including a common transmisison element operatively connectible to said head and kerf f .cutter to rotate the former and to swing the latter, said lrer'f cutter being connected to said element at all times during motor operated head rotation, and devices releasable .at will for connecting said kerf cutter Y,to said element by a direct attachment which precludes any relative movement between said element and said ker'f cutter and for holding said lerf cutter against swinging movement relative to said head duri-ng head 'rotation, said kerf `cutter holding devices being released and said cutter head held against rotation about its axis during swinging of said kerf cutter.

75. In a mining apparatus, the com-bina- -,tion of a body, keric cutting mechanism including a cutter head mounted on said body for rotation about a longitudinal axis and a kerf cutter pivot-ally mounted on said head for swinging movement relative thereto, -motor operated devices for rotating said head about its axis including a final transmission -element having a pitch line speed appropriate for swinging said kerf cutter at Y a cutting speed and fixedly connectible to .said head to rotate the latter on said longitudinal axis. said element when so connected being completely immovable relatively to said head, and mechanism driven by said transmission element operative when said element is disconnected from said head to effect swinging of said lerf cutter.

76. In a mining apparatus, the combination of a body, kerf cutting mechanismv including a cutter head mounted on said body for rotation about a longitudinal axis and a kerif cutterpivotally mounted on said head for swinging movement relative thereto, motor operated devices for rotating said head about its axis including a final transmission element having a pitch line speed appropriate for swinging said kerf cutter at a cutting speed and fixedly connectible to said head to rotate the latter on said longitudinal axis, said element when so connectedbcing completely immovable relatively to said head, mechanism driven by said transmission element operative when said element is disconnected from said head to effect swinging of said kerf cutter, and

means for holding said cutter head against rotation during swinging of said kerf cutter.

77. In a mining apparatus, the combination of a body, kerf cutting mechanism including a cutter vhead mounted on said body for rotation about a longitudinal and a lrei'f cutter pivotally mounted on said head for swinging movement relative thereto, motor operated devices Jfor rotating said head about its axis including a final transmission element having a pitch line speed appropriate for swinging said lrerf cutter at a cutting speed and fixedly connectible to said head to rotate the latter on said longitudinal axis, said element when so connected being completely immovable relatively to said head, mechanism driven by said transmission element operative when said element is disconnected from said head to `effect swinging of said kerf cutter, and means for holding said kerf cutter against swinging movement relative to said head during head rotation.

In testimony whereof I affix my signature.

MORRIS P. HOLMES. 

